Comment 5 for bug 439768

I lied again, it doesn't happen every boot. It only happens when I start the laptop without the a/c adapter plugged in. The default behavior when unplugged is to dim the screen and when it tries to do this it jumps between two brightness levels in a loop. This also happens if I increase or decrease brightness by holding down my Fn + Brightness key. If I tap the Fn + Brightness instead of holding it down it will adjust without looping.